Unprecedented hot and dry spells occurred all over Israel for six days, from May 16 to May 21, 2020. Maximal air temperature reached 46.5 °C and minimal relative humidity reached 10%. The total number of hours with temperature of ≥40 °C was 45 and 41 in the coastal plain and the Judean mountains foothills, respectively. The downy mildew pathogens of cucumber and grapevine survived this extreme event, showing a rapid revival in nature soon after the heat wave. The current isolates of these oomycetes seem to be more tolerant to heat compared to the isolates of the previous century.

中文翻译：

---

在以色列极端炎热和干燥天气条件下，在 Pseudoperonospora cubensis 和 Plasmopara viticola 领域的生存

2020 年 5 月 16 日至 5 月 21 日，以色列全境连续六天出现前所未有的炎热和干旱。最高气温达到 46.5 °C，最低相对湿度达到 10%。沿海平原和朱迪亚山麓的温度≥40℃的总小时数分别为45和41小时。黄瓜和葡萄藤的霜霉病病原体在这次极端事件中幸存下来，在热浪过后不久在自然界中迅速复苏。与上个世纪的分离物相比，这些卵菌的当前分离物似乎更耐热。